package com.ruoyi.web.controller.common;

import java.io.*;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.documents4j.api.DocumentType;
import com.documents4j.api.IConverter;
import org.jodconverter.core.DocumentConverter;
import org.jodconverter.core.document.DefaultDocumentFormatRegistry;
import org.jodconverter.core.office.OfficeUtils;
import org.jodconverter.local.LocalConverter;
import com.documents4j.api.IConverter;
import org.jodconverter.local.office.LocalOfficeManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 上传模板请求（单个）
     */
    @PostMapping("/uploadTempFile")
    public AjaxResult uploadTempFile(MultipartFile file) throws Exception {
        try {
            String extension = null;
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;

            int dotIndex = fileName.lastIndexOf(".");
            if (dotIndex > 0) {
                extension = fileName.substring(dotIndex + 1);
            }

            if (!"pdf".equals(extension.toLowerCase())) {
                String replace = fileName.substring(15);

                File inputFile = new File(filePath + replace);

                fileName = fileName.substring(0, dotIndex) + ".pdf";

                String replace1 = fileName.substring(15);

                url = serverConfig.getUrl() + fileName;

                //转换word成pdf
                File outputFile = new File(filePath + replace1);
                try {
                    String osName = System.getProperty("os.name").toLowerCase(Locale.ROOT);
                    InputStream docxInputStream = Files.newInputStream(inputFile.toPath());
                    OutputStream outputStream = Files.newOutputStream(outputFile.toPath());
                    if (osName.contains("win")) {
                        System.out.println("*************************执行Windows转换开始*******************************");
                        IConverter converter = com.documents4j.job.LocalConverter.builder().build();
                        if ("docx".equalsIgnoreCase(extension)) {
                            converter.convert(docxInputStream).as(DocumentType.DOCX).to(outputStream).as(DocumentType.PDF).execute();
                        } else if ("doc".equalsIgnoreCase(extension)) {
                            converter.convert(docxInputStream).as(DocumentType.DOC).to(outputStream).as(DocumentType.PDF).execute();
                        } else {
                            converter.convert(docxInputStream).as(DocumentType.MS_WORD).to(outputStream).as(DocumentType.PDF).execute();
                        }
                        outputStream.close();
                        System.out.println("*************************执行Windows转换结束*******************************");
                    } else if (osName.contains("nix") || osName.contains("nux") || osName.contains("mac")) {
                        System.out.println("*************************执行Centos转换开始*******************************");
//                        LocalOfficeManager officeManager = LocalOfficeManager.install();
                        LocalOfficeManager officeManager = LocalOfficeManager.builder().officeHome("/usr/lib64/libreoffice").install().build();
                        try{
                            officeManager.start();
                            DocumentConverter converter = LocalConverter.builder().officeManager(officeManager).build();
                            if ("docx".equalsIgnoreCase(extension)) {
                                converter.convert(docxInputStream).as(DefaultDocumentFormatRegistry.DOCX).to(outputStream).as(DefaultDocumentFormatRegistry.PDF).execute();
                            } else {
                                converter.convert(docxInputStream).as(DefaultDocumentFormatRegistry.DOC).to(outputStream).as(DefaultDocumentFormatRegistry.PDF).execute();
                            }
                        }finally{
                            OfficeUtils.stopQuietly(officeManager);
                        }
                        System.out.println("*************************执行Centos转换结束*******************************");
                        // 使用libreoffice6.4命令（无需完整路径）
//                        String[] command = {
//                                "libreoffice6.4", // 使用配置后的命令
//                                "--headless",
//                                "--invisible",
//                                "--convert-to", "pdf",
//                                filePath + replace,
//                                "--outdir", new File(filePath + replace1).getParent()
//                        };
//                        ProcessBuilder processBuilder = new ProcessBuilder(command);
//                        // 重定向错误流到标准输出流
//                        processBuilder.redirectErrorStream(true);
//                        Process process = processBuilder.start();
//                        // 读取并打印命令的输出
//                        try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
//                            String line;
//                            while ((line = reader.readLine()) != null) {
//                                System.out.println(line);
//                            }
//                        }
//                        int exitCode = process.waitFor();
//                        if (exitCode != 0) {
//                            throw new IOException("Conversion failed with exit code " + exitCode);
//                        }
                    } else {
                        return AjaxResult.error("上传失败!!!");
                    }

                    System.out.println("转换完成！");
                } catch (Exception e) {
                    e.printStackTrace();
                    return AjaxResult.error(e.getMessage());
                }
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response) throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

}
